DIGITAL MEDIA
- Digital imagery
- o Uses an electronic image sensor to record images data vs. chemicals on film
- o 2 types of sensors are CCD and CMOS sensors
- Pixel – single element point or dot that contains color
- o A pixel can only be on/off
- Bit depth – the number of bits of information each pixel can understand
- o The number of bits a pixel can understand is correlated to how many bits are in the monitor
- 8 bit computer = 28 different colors can be displayed
- Digital photography terminology
- o Focal Length
- § The distance between the center of a lens or curved mirror and its focus
- o Aperture
- § The opening that determines how much light you let into the camera
- o ISO
- § The measure of photographic film’s sensitivity to light
- o Shutter Speed
- § The length of time a camera’s shutter is open
- o sRGB
- § A standard RGB color space for use on monitors, printers, and the internet
- o Exif data
- § (Exchangeable image file format) a standard that specifies the formats for images, sound, and tags used by digital cameras
- o RAW image format
- § A basic format with minimally processed data
- o Focal Length
- JPEG
- o (*.jpg) (Joint Photographic Experts Group)
- o Standard web image file type
- o Compressed, lossy
- GIF
- o (Graphics Interchange format)
- o 256 colors maximum
- o Can animate in short loops
- PNG
- o (Portable Network Graphics)
- o Replaced GIFs because they’re much more flexible, color wise.
- For small web graphics, use PNGs.
- For animated web graphics, use GIFs.
- Composition of photography
- o Pick on focal point and isolate the subject
- o Simplify your background
- o Avoid unrelated subjects
- o Rule of Thirds
- § Avoid centering objects
- § Place the center of interest in the intersection of the 4 imaginary lines in the rule of thirds